/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.submarine.server.submitter.yarnservice.utils;

import org.apache.hadoop.yarn.service.api.records.Resource;
import org.apache.hadoop.yarn.service.api.records.ResourceInformation;
import java.util.HashMap;
import java.util.Map;

/**
 * Resource utilities for Submarine.
 */
public final class SubmarineResourceUtils {
  private SubmarineResourceUtils() {
    throw new UnsupportedOperationException("This class should not be " +
        "instantiated!");
  }

  public static Resource convertYarnResourceToServiceResource(
      org.apache.hadoop.yarn.api.records.Resource yarnResource) {
    Resource serviceResource = new Resource();
    serviceResource.setCpus(yarnResource.getVirtualCores());
    serviceResource.setMemory(String.valueOf(yarnResource.getMemorySize()));

    Map<String, ResourceInformation> riMap = new HashMap<>();
    for (org.apache.hadoop.yarn.api.records.ResourceInformation ri :
        yarnResource.getAllResourcesListCopy()) {
      ResourceInformation serviceRi = new ResourceInformation();
      serviceRi.setValue(ri.getValue());
      serviceRi.setUnit(ri.getUnits());
      riMap.put(ri.getName(), serviceRi);
    }
    serviceResource.setResourceInformations(riMap);

    return serviceResource;
  }
}
